Year: 2015
Type: letter
Abstract: We read with interest the article by Rooney et al.,1 who reported no significant high-risk clusters of patients with amyotrophic lateral sclerosis (ALS) in the Irish ALS Register. They referred to reports, including our own, of statistically increased frequency of ALS in Finland, northern New England, and France.2,–,4 Methodologic, conceptual, and real differences between risk factors in one region and another may explain the differences between studies. If cases are aggregated over large areas, the effect of a localized toxic exposure may …
Source: Neurology
Language: English
Subfield: Clinical Neurology
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W3056015707